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Annabelle, 33, split from Chris, 40, earlier this year. He is now dating actress Dakota Johnson , 28. Meanwhile Jon, 46, has previously spoken of the pain of his split from actress girlfriend Jennifer Westfeldt , 47, in September 2015.

They had been together for 18 years and their split came after he went into rehab for alcohol abuse. He later said: “It’s hard to be single after being together for a long time. It’s really hard. It sucks.”

Since the split, he has been linked with Underworld star Kate Beckinsale , 44. But he hit it off with Annabelle when they worked on new film Tag! this summer.

The source adds: “For Jon to take Annabelle to a public event where there are lots of people, their relationship must mean a lot to him.”